Documentation of icons

[princethrash]

I see that some smplayer icon themes change the main program icon of smplayer (in the window manager and the panel). At first I thought this icon was background.png, but turned out to be wrong. Which icon relates to this?

Or even better, where is the documentation that explains each possible icon? While 80% of them are obvious just in their file name, the rest are not, and that doesn't include all potential icons that smplayer will look for.

[rvm]

[princethrash]

Fantastic, thanks.